I was routing through someone's change and found this. Had a lot of gunk, most I got off but maybe could get the rest off the reverse. I am guessing it is worth melt?
This one basically worth melt. There is a much more valuable variety called "hoof through 6" in the date.
Though I wouldn't use the stuff on any coin that you want to keep pristine, a product called goo-gone removes many many things off a variety of surfaces. I've used it on bronze and it really works .. as well as lots of stuff around the house.
I soaked it in acetone for a couple weeks, a lot of the gunk was removed. I checked for that design in 6, this obviously doesn't have one.